Polishing machine



AUS- 3, 1943. E. E. MURRAY POLISHING .MACHINE Filed July 22, 1940 4 Sheets-Sheet 1 INVENTOR .Zv/f- BY M44' Filed July 22, 1940 4 Sheets-Sheet 2 .f h E mj e JUHUH l \\H\\\\\ a f -l 6 4 5.

ATT

All@ 3, 1943 E. E. MURRAY 2,325,701

POLISHING MACHINE Filed July 22, 1940 4 Sheets-Sheet 3 A118 3, 1943- E. E. MURRAY 2,325,701

POLISHING MACHINE Filed July 22, 1940 4 Smeets-Sheet 4 TToRN i f llowln sneeieetiomendiheldrewxggs iormmg yapaurtthereof.Y f l a l 11 y Fmire -4 is` transverse Seetiona1;,

Patented Aug; 3, 1943Y -goc'icimc (c1. 51,*1669' I menue# relanze?l te Mempantieularm it re1atea tee-Simple.. easily adjustable polishing or L c pact, and

on aA conveyer or turmtebe te be met l' `vluralim of; humm `ar helmut. wheels um smhat when the; part m'nassedlall et umts'th surface will be mlptely :wished: er bucc4 Y W f r 'wheel tesemr 'with #ne amnent mcccs `:me f y convenlerml in; Vall#:infecties limi "thefmotor andthe wheel.

x myand nnwmch ppc mcchmclr Mcm; once been I bers ofthe machina btokenf'way ta illustrete mere cleaxjly weneemeet awaits: t

a conplamivicfw` cftnehiccpce with" entienda 4e meeting limited oscillation cfxchc pcxicmpg :Wnccl` f e bc'nnishedaremeumed :ily appreeiatedtnatlz u will polishoximf: a 'ccxnam c `tion icf the irregmerly shapedpertlte he fmiehed 'As is eometienal in app iatuscfthi charmer; tbeverieus making up 1imyenucngllusercccdm cnc 'di `l dxscloscaccmpnscsc rclc elynccvy ecce, ber'l whiehjis .ademen terse@ en cent the .c nveyer 0r turntabl ,(nQt. 15mm) a which 11s` conveniently rcccpc c Y "me n nc avec; rieures illuctnctmg it; detail thejf means fer! adlfus'ing the Diesem? G- rotation in the yoke.

for a pair of uprlghts l2 on which is slidabiy mounted'a yoke I3 which serves to mount the polishing, head structure hereinafter described in Y iaeiail.- f

v It will be readily apparent that a hydraulic jack or lother elevating memberimay be dis- I6 extends through thev yoke member and has anchored thereto a worm wheel Il which meshes with a worm I3.` vThe worm is mounted on a shaft I9 journalled in a plurality of bosses 2llintegrally formed with the. yoke member I3. V

Theshaft at 'its rearward end is provided with a handcrank 2l."

From the, foregoing, 'itzwillfbe apparent that theV ring member I4 can `be rotated about theV trunnions, I; and l'through 360 of4 movement by rotation of the crank 2l. A circular table 25 is rotatably `mounted within. the ring vl ii and, as

is clearly seen in Figure 3 ofthe drawings," the 'periphery of the table is provided'with teeththus f'ormilflg4 the tableasa (discflike worm wheel.

The teeth on the periphery of the tablez mesh with a, worm 255 on a shaft 2l, which shaft is journalled for `rotation in suitable bosses '28, preferably lforme'd Aintegral, with `the ring member M Shaft 21 may be easily( and yconveniently rotated by means of a handVv crank 2,5357,Y It' will,V

therefore, be seen that ,rotationv of the crank 29 y (will serve torotate the table 25 about an .axis

substantially perpendicularv to,Y theV axis about whichthe ring is, rotatable."` It will also Vbe apparent lthat the table, may be. rotated by l differentu means through `an angularity. of 1360" and sincek the ring member as above described may also be rotated through 360 by vmeans of crank 2I, itl is possible ,byadjustment Vbetvv'eenthese twomembers to' dispose" the ytable in any desired position-11n other Words, vitfis clear that the table Y25 Vis conveniently adjustablefor .universal lInoveirnent. 1`Likewise, "it will be jap'- 1 preciated thatldue tothe fact Vthat the adjust-Y ing means comprises vworm gearing; `.the table when j once adjusted' willV bef maintained locked in predetermined desired position.'`

Mounted onthe table y25 isffanj electric motor 3U whichV may be supplied Awith current bya suitable flexible vcord (not shown) Aand as Vis* seen-in'Figure 1 of the drawings, Vtherr'iotor tu is'mounted byfmeansfof a hingeSI 'and'.4 adjustingfstud 32 'injorder to ,tighten the'V drive belts from the motor when .theisanle vbecomes necessary.'y The'motor has anchored directly-to the" shaft thereof a pulley 32 vwhich` serves l to w i drive the mechanism hereinafter describedA Proi jecti'ng downwardly from the opposite side of the tables on whicliihe motor is mounted is 4a rigid army 35 whichl has pivoted thereto an arm 35 by' means of ashaft 31.` Journalled for vrotation on the-shaft Slis apulley wwhich by Y means of a plurality of. drive belts ss'islrlvingly connected withtjhe pulley 432.01 the moto AS is Seen in Figure-3 'of the. drawings, ings@ v belt-3 extend through a suitableraperture in the Vtable'is.-y i

Y VAsis"clearly, ,seenin Figure*ljof'lthedraw-, ings, the `arm 36 'has an extensible portiont Cil ` adjustably connected thereto by means of bolts il in order that the effective length of 'this arm may be increased or Vshortened as may be desired. The outer end of the arm di) is bifurcated to provide a pair ofvbearings 152 in which is jcurnalled a shaft d3 which carries a pulley da. `This pulley iii is connected by. means of Y driving belts i5 with the pulley 38. and it will be seen that these belts may be maintained at the e proper adjustment by increasing the effective length Vof the arm composed of the members and fait. c

f VThe shaft i3 Acarries a polishing or bung Y f wheel 5i! anchored thereto in conventional manner which wheel is preferably partiallytsur- 'Y roundedby aclust receiving housing 5I anchored to the plate member 25 as best illustrated in the sectional'view'of Figure. This housing has communicating Vtherewith a ilexible conduit- 52 ,which may conveniently be connected to anv exhaust-,blower l(not'sllovvn) to exhaust dust andl dirt created during'n the polishing Moperation. l Y Y i'v :i l Inview of the fact that theaxis of'A rotation of the pulley 38' coincides `with the axis ofjpiv'e otal movement rof the arm vSgit ewillbe.- seen that the arm supporting the "polishing 4wheel itil may be adjusted throughout a s u bstanti'all angular degreey of movement without fin any fiway interferingivviththe drive thereof. by thernotr 30. -The arm V35 may-.be'adjusted to the prede termined desired 'position by means of Vanad- `justing screwV lrod 663A which 'is connectedfby means of a' compressionpoil-'spring 6I and abuttingl a suitable projection 893011 thev memb'er. In addition, the member i3 is'iconnectedV by a tension coil-spring `Ylil directly-'tov the fplatefQ iin-order that as the'screw-E is unscrewedgjthe coilisprin'g 'Ilawill draw theY member i6 -toward the plate y25J 'This screw rod tdextends iupwardlyY througha suitable aperture in the tablek V225 as is Vclearly seen l'n Figurej and passes through a split nut vcomprising separate `lflalves 62 iand' 63.{The nut ,half Ei; isorigidly-bolted tothe table bymeans of ascrew 4{i4-and-ispro? vided'with asemi-CyIindrical grooveforree Y ceptionofthe s-crew rod 50; VlThefnuthalf63`is -mounted for pivotal-movement by `means :of a

pin t5 and has a semi-cylindrical internally threaded recess adapted vto engage-the screw Gil. Y*

t From the foregoing, it will be seen that in order to eect rapid adjustment'of thefscrew rod, v M the nut half d3 maybeswungiaroundfits pivot and the polishing wheelbodily elevated out, of

operative'position.Y l o i Ihis is a particularly desirable. feature vof the present invention because-.it permits rapidlelevationof the polishingwheelaway vfromv operative Y ,positionY when it'Y becomesYnecessalyl tolchange wheels and ai; the same time permitstiie usi-scf, a relatively fine screw thread forfa'cc'urate 'adjustment of the position of the polishing wheel j when located in Vthe position to engage `'lilies/vork.

In operation Vof the apparatus," itwill seen thata plurality of units ofthe typedescrib-ed Q above can be placed with their bases on the `floor` adjacentaconveyer or turntable 'carrying thearticles to be polished. The polishing wheel 5t? may be bodily movedin a horizontall direction ro- :tation of the feedjs'crewjt` operated by the crank 2 9. The yoke I fmay be v*adjusted on the uprights l 2 tofthe predetermined desired (vertical position.

` By. rotation of the shaftVK llby means of'thecrank ai, vthe table Whiehcarries tnemotoe; polishing Y wheel, andinterc'onnecting drive mechanism may e be swung to .desired position about Lavgenerallzy t "horizontal axis provided: by theltrunnions lei and 1R. @In addition,l rotation oi `tlhejcrank 129 Vwill me to adjuster@ pimnfoflmetabie :s about t e `annessi substantialnpemendieuiar :to Y of the :trunrlions 15 `anat.` thereby permitting r'iiversal movementofllthepositionof the polish;

nig wheel. Ihroughfthe medium'of-icranksfl t and illthe polishing wheebmay lbetlocated `at the angulanlpo'sition with 4respect lto the work passing "on-V the feomreyei'y with which t `the t worxisassiated1-e'me pressured thewhed v `a'gaix'lst-tlxefwerk may-beaccurately adjustedlby e meolnsgoi theiscrewrod and: it uill'bexseen that t 15 when@ the split 1 nut I3 is swung A`upwardly, the polishing wheelfmayzbe rapidly and bodily raised l out of operative position to` facilitaterrapidj lWith reference `to the modied form offthe `inv" vention shown in Figures 7 and 8itwill be read-L ily seen that this embodiment of the inventionis designed and intended for installations where it e is desired to impart a lateral oscillatory movelment to the polishingr wheel while in engagement with the work to distribute wear morelevenly'over l the surface of the polishing wheel `and at the tively` contact a larger area of thework surface.

Y ln this form `of the invention, a slightly modined form "of table 'Hl` is employed which, similar tol the table 25is provided with teeth at its periphery to constitute `a work wheel adapted to` be same time permit the polishing wheelltoefe,

\ L"A,polishingmachine including `in, combina; tion, a universally; adirmtabie iplate, a. Ymotor mounted on :.onesideof said plate, meanson the oppositefside oi, said plate for: supporting .a Y

polishing `wheel, means drvingly interconnect',- ing said motor and' `said polishing VWheeljan adwith respect to the. other section. l

n 2, Ina-machine of the type describedinzeorn- Q fbinatio'rx, ankassembly for anrotatingfwork tool,"

ncludingranann mounted fonoscillation about t axed axis,'a! tool l'iolding` spindle mounted lin h saidV arm parallel` to said axis, a pulley conc'en-4 tric with said axis, a stationary motor support i having a motor mounted thereon, means driv- ,t ing said'pulley from` said motor, means driving said spindle from said'pulleygspringing means supporting said arm againsthgravityY at an `angle with respect to `the vertioalandspringing means Y including the first Anamed springingmeans opposing oscillation of said arm out ofrits selected rotatedsby means of the worm` when 26, shaft V2l,` andcranlr` 29Min the same manner as Vhas been described'above in connection `with the preferred e embodiment of the invention. This table `hasi at its lower side a shaftsupport memberll rigidly secured to themtablewl-llch provides means `for rotatably mounting ashaft '|12.V `The shaft12: serves at its lower end to support an arm 13 vl which provides the pivotal connection 31 vofthe A arms `36 and 40 which together provide means for mounting the polishing wheel 50 as has been de- "scribedi'tboi/e.v m `i Y, i 1 Onthe upper side of the table isjmountedv an jelectricmotor 15 which bymeans of an eccentric 16" and link` 'I'Iconnects with a crank Non the i e upper Vend of the shaft '|2.` It will, therefore, be

" "apparent that asV the motorf15 rotates, it will im- A part tothe` shaftf12 a limited oscillatory move-Y ment which will serve to effect a relatively limited oscillatory lateral movement of` the polishing Wheel. This lateralroscillatory movement is suf-` position, means for adjustably rotating saidas-,Vv4 sembly through 360 `aboutan axis generally"y e perpendicularto the axisof said toolyholdingl spindle, and additionalA means for adjustably.

rotating said assembly through 360V aboutfan axis generally ,parallel to theaxis ofsaidtool e `holding`spindle. s ,A Y 1 f 3. `In amachine of theutypedescribed,` in corn-- lbinatiom an assembly for `a rotating Work tool,

- including an arm mounted for oscillation about' ncietly limited in extent so that auoesnot Vmateriallyaffect'the tension of the driving belts,'

Vandfit will'bg seen that the magnitude of thisv oscillatory? movementcan be carefully and adef quatelycontrolled byfvaryingthe magnitude, of

tlfleleccentriclli.` Y n y Y Lateral `oscillatox'fy movemenifof` thefpolishing -1 l. 4. In a machine of` the a `fixed axis, a tool, holdingfspindlermounted in said arm parallel `to said axis, a pulley concen tric` Withjsaidaxis,` a stationary motor `support v havingarnotor mounted thereon,gsai`d arm `be` ingadjustable in length,;said motor-support be; f f` ingiadjustable toward and away from'saidaxis,

means 'driving said pulley from said ,motor,

means driving said` spindle from said pulley, Y springing lrneans supporting saidV arm against` gravity atan angle `with respecjbrto the Vertical and springing means including the first namedspringing meansropposing oscillation of said arm Y out of fits selected position, means for adjusta` y `blyrotating `said assembly through 360 about an'laxis generally perpendicular tofthevaxisoi said tool holdingl spindle, and additional means e forl adjustably rotating said assembly through,` l `360aboutanaxis generallyparallel tothe axis of said vtool holdingspindle.` i y Y type described, in

A combination, an'lassembly for a rotating'work wheel 50 will increase theeifective'area of `th`e` l polishing action ofthis wheel'` and will atthe same time distribute wear more uniformly over the peripheral surface thereof.

` `It will likewise be readilyapparent that if the t motor` 15l is not operated, the shaft 12 will be relatively rigidly locked in position in order that "the apparatuswill then function substantiallyin the same mannerY as that described in connection` withthe preferred embodiment of the invention.

toolincludingan arm, mounted for oscillation about a xed' axis, `a tool holding spindle mountf edin said arm parallel to said axis, a pulleycon;-`

- centric with saidaxis, astationary motor 'sup- It will be readily appreciated that many other andifurther modifications `of the invention may be made without departing from the spirit thereof as set forth in the subjoined claims; l

Whatis claimedis: 1 l

Vport having a` motor mounted thereon,` means `driving said pulley from said motor, means driving Asaid `spindle from `said pulley, `springing means supporting said arm againstgravity at an` e angle Withrespect to the VerticaliandtspringingV means `including `the first] named springing means opposing oscillation `of saidA armto'ut' of its` selected position,'means for adjustablyfro:` Y tating said assembly through 360? about a' `hori zontal axis generally-perpendicular to the axis of `said tool holdingspindleand additional means A for adiustably rotating e saidassembly bodily the axis of said tool holding' spindle.

k5. A machine ofthe type described compris-V.

ing, in combination, anruprightstandard, a supy portngrmembermounted on saiclstandardand Y projecting toonesidathereof, an annulary member, pivot meansV connecting saidV annularmem- 4ber to said vsupporting member,` a plate member, f a motor mountedxon saidplate member, support means on" the opposite side ofsaid plate member from the side on which the-motor is mounted, aV rotatable Work Wheel adjustably'mounted With respect to said plate member by said sup- `port Ymeans,jrneans drivingly interconnecting said motor and sadwheel, and means rotatably Y 1 connecting said plate member to said annular member-Tor rotation about an axis at substantially 90 to the, axis of the pivot means.

Y, 6. A -machinejofA the type described compris ing, inV combinatiomanj upright v'stzi,n' :iard, aV supporting member mounted., on;- said standard and projectingto oneside thereofg'an annular VVfrnernber, ipivo't` means connecting said annular mer'nberV to :said'supporting member, Vaplate member, a 'motonmounted on Asaid plate member,'support 4meansl onthefopposite side of said plate lmember from4 the side onwhich the motor j axis at substantially.' 90ft0 the axis of thefloivot is mounted, a lrotatable"Work Wheel adjustably .mounted withrespect'to saidk plate member by said/support meansand disposedtwithin the connesjof said annular member; means `drivingly interconnecting said'imotor and said Wheel,V and means. rotatably connecting said' plate pmember v a to said .annular member forY rotation aboutfan I ERNEST E.A MURRAY; 

